Emily Dickinson Lexicon

SKY, n. [Sw. sky, Dan. skye, a cloud; Dan. sky-himmel, the vault of heaven.]

1. The aerial region which surrounds the earth; the apparent arch or vault of heaven, which in a clear day is of a blue color. – Milton.
2. The heavens. – Dryden.
3. The weather; the climate. – Johnson.
4. A cloud; a shadow. [Obs.] – Gower.